NETGEAR Powerline 1200 Quick Start Manual page 9

Add Adapters
To add adapters before you configure the security feature, just plug them
in and connect the adapters to your equipment.
¾ To add adapters to a Powerline network with security set:
1. Plug in and connect the new adapters.
2. On any of the adapters that are already a part of the secure network,
press and hold the Security button for two seconds.
3. On the new adapter, press and hold the Security button for two
seconds.
Both buttons must be pressed within two minutes.
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